[PATCH 12/15] drm/modes: add connector reference counting.
Dave Airlie
airlied at gmail.com
Fri Apr 15 05:10:43 UTC 2016
From: Dave Airlie <airlied at redhat.com>
This uses the previous changes to add reference counting to the
drm connector objects.
Signed-off-by: Dave Airlie <airlied at redhat.com>
---
drivers/gpu/drm/drm_atomic.c | 19 +++++++++++++++++--
drivers/gpu/drm/drm_crtc.c | 39 ++++++++++++++++++++++++++++++---------
drivers/gpu/drm/drm_fb_helper.c | 38 ++++++--------------------------------
include/drm/drm_crtc.h | 13 ++++++++++++-
4 files changed, 65 insertions(+), 44 deletions(-)
diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index 8ee1db8..9d5e3c8 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -154,6 +154,7 @@ void drm_atomic_state_default_clear(struct drm_atomic_state *state)
state->connector_states[i]);
state->connectors[i] = NULL;
state->connector_states[i] = NULL;
+ drm_connector_unreference(connector);
}
for (i = 0; i < config->num_crtc; i++) {
@@ -924,6 +925,7 @@ drm_atomic_get_connector_state(struct drm_atomic_state *state,
if (!connector_state)
return ERR_PTR(-ENOMEM);
+ drm_connector_reference(connector);
state->connector_states[index] = connector_state;
state->connectors[index] = connector;
connector_state->state = state;
@@ -1614,12 +1616,19 @@ retry:
}
obj = drm_mode_object_find(dev, obj_id, DRM_MODE_OBJECT_ANY);
- if (!obj || !obj->properties) {
+ if (!obj) {
+ ret = -ENOENT;
+ goto out;
+ }
+
+ if (!obj->properties) {
+ drm_mode_object_unreference(obj);
ret = -ENOENT;
goto out;
}
if (get_user(count_props, count_props_ptr + copied_objs)) {
+ drm_mode_object_unreference(obj);
ret = -EFAULT;
goto out;
}
@@ -1632,12 +1641,14 @@ retry:
struct drm_property *prop;
if (get_user(prop_id, props_ptr + copied_props)) {
+ drm_mode_object_unreference(obj);
ret = -EFAULT;
goto out;
}
prop = drm_property_find(dev, prop_id);
if (!prop) {
+ drm_mode_object_unreference(obj);
ret = -ENOENT;
goto out;
}
@@ -1645,13 +1656,16 @@ retry:
if (copy_from_user(&prop_value,
prop_values_ptr + copied_props,
sizeof(prop_value))) {
+ drm_mode_object_unreference(obj);
ret = -EFAULT;
goto out;
}
ret = atomic_set_prop(state, obj, prop, prop_value);
- if (ret)
+ if (ret) {
+ drm_mode_object_unreference(obj);
goto out;
+ }
copied_props++;
}
@@ -1662,6 +1676,7 @@ retry:
plane_mask |= (1 << drm_plane_index(plane));
plane->old_fb = plane->fb;
}
+ drm_mode_object_unreference(obj);
}
if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) {
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index f6bf828..90bc597 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -861,6 +861,16 @@ static void drm_connector_get_cmdline_mode(struct drm_connector *connector)
mode->interlace ? " interlaced" : "");
}
+static void drm_connector_free(struct kref *kref)
+{
+ struct drm_connector *connector =
+ container_of(kref, struct drm_connector, base.refcount);
+ struct drm_device *dev = connector->dev;
+
+ drm_mode_object_unregister(dev, &connector->base);
+ connector->funcs->destroy(connector);
+}
+
/**
* drm_connector_init - Init a preallocated connector
* @dev: DRM device
@@ -886,7 +896,7 @@ int drm_connector_init(struct drm_device *dev,
drm_modeset_lock_all(dev);
- ret = drm_mode_object_get_reg(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR, false, NULL);
+ ret = drm_mode_object_get_reg(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR, false, drm_connector_free);
if (ret)
goto out_unlock;
@@ -2106,7 +2116,7 @@ int drm_mode_getconnector(struct drm_device *dev, void *data,
mutex_lock(&dev->mode_config.mutex);
- connector = drm_connector_find(dev, out_resp->connector_id);
+ connector = drm_connector_lookup(dev, out_resp->connector_id);
if (!connector) {
ret = -ENOENT;
goto out_unlock;
@@ -2190,6 +2200,7 @@ int drm_mode_getconnector(struct drm_device *dev, void *data,
out:
drm_modeset_unlock(&dev->mode_config.connection_mutex);
+ drm_connector_unreference(connector);
out_unlock:
mutex_unlock(&dev->mode_config.mutex);
@@ -2834,13 +2845,14 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
}
for (i = 0; i < crtc_req->count_connectors; i++) {
+ connector_set[i] = NULL;
set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr;
if (get_user(out_id, &set_connectors_ptr[i])) {
ret = -EFAULT;
goto out;
}
- connector = drm_connector_find(dev, out_id);
+ connector = drm_connector_lookup(dev, out_id);
if (!connector) {
DRM_DEBUG_KMS("Connector id %d unknown\n",
out_id);
@@ -2868,6 +2880,12 @@ out:
if (fb)
drm_framebuffer_unreference(fb);
+ if (connector_set) {
+ for (i = 0; i < crtc_req->count_connectors; i++) {
+ if (connector_set[i])
+ drm_connector_unreference(connector_set[i]);
+ }
+ }
kfree(connector_set);
drm_mode_destroy(dev, mode);
drm_modeset_unlock_all(dev);
@@ -4957,7 +4975,7 @@ int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data,
}
if (!obj->properties) {
ret = -EINVAL;
- goto out;
+ goto out_unref;
}
ret = get_properties(obj, file_priv->atomic,
@@ -4965,6 +4983,8 @@ int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data,
(uint64_t __user *)(unsigned long)(arg->prop_values_ptr),
&arg->count_props);
+out_unref:
+ drm_mode_object_unreference(obj);
out:
drm_modeset_unlock_all(dev);
return ret;
@@ -5007,25 +5027,25 @@ int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data,
goto out;
}
if (!arg_obj->properties)
- goto out;
+ goto out_unref;
for (i = 0; i < arg_obj->properties->count; i++)
if (arg_obj->properties->properties[i]->base.id == arg->prop_id)
break;
if (i == arg_obj->properties->count)
- goto out;
+ goto out_unref;
prop_obj = drm_mode_object_find(dev, arg->prop_id,
DRM_MODE_OBJECT_PROPERTY);
if (!prop_obj) {
ret = -ENOENT;
- goto out;
+ goto out_unref;
}
property = obj_to_property(prop_obj);
if (!drm_property_change_valid_get(property, arg->value, &ref))
- goto out;
+ goto out_unref;
switch (arg_obj->type) {
case DRM_MODE_OBJECT_CONNECTOR:
@@ -5042,7 +5062,8 @@ int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data,
}
drm_property_change_valid_put(property, ref);
-
+out_unref:
+ drm_mode_object_unreference(arg_obj);
out:
drm_modeset_unlock_all(dev);
return ret;
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index 855108e..3691565 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -153,40 +153,13 @@ int drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper, struct drm_
if (!fb_helper_connector)
return -ENOMEM;
+ drm_connector_reference(connector);
fb_helper_connector->connector = connector;
fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector;
return 0;
}
EXPORT_SYMBOL(drm_fb_helper_add_one_connector);
-static void remove_from_modeset(struct drm_mode_set *set,
- struct drm_connector *connector)
-{
- int i, j;
-
- for (i = 0; i < set->num_connectors; i++) {
- if (set->connectors[i] == connector)
- break;
- }
-
- if (i == set->num_connectors)
- return;
-
- for (j = i + 1; j < set->num_connectors; j++) {
- set->connectors[j - 1] = set->connectors[j];
- }
- set->num_connectors--;
-
- /*
- * TODO maybe need to makes sure we set it back to !=NULL somewhere?
- */
- if (set->num_connectors == 0) {
- set->fb = NULL;
- drm_mode_destroy(connector->dev, set->mode);
- set->mode = NULL;
- }
-}
-
int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper,
struct drm_connector *connector)
{
@@ -213,10 +186,6 @@ int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper,
fb_helper->connector_count--;
kfree(fb_helper_connector);
- /* also cleanup dangling references to the connector: */
- for (i = 0; i < fb_helper->crtc_count; i++)
- remove_from_modeset(&fb_helper->crtc_info[i].mode_set, connector);
-
return 0;
}
EXPORT_SYMBOL(drm_fb_helper_remove_one_connector);
@@ -2024,7 +1993,11 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper)
/* need to set the modesets up here for use later */
/* fill out the connector<->crtc mappings into the modesets */
for (i = 0; i < fb_helper->crtc_count; i++) {
+ int j;
modeset = &fb_helper->crtc_info[i].mode_set;
+
+ for (j = 0; j < modeset->num_connectors; j++)
+ drm_connector_unreference(modeset->connectors[j]);
modeset->num_connectors = 0;
modeset->fb = NULL;
}
@@ -2045,6 +2018,7 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper)
drm_mode_destroy(dev, modeset->mode);
modeset->mode = drm_mode_duplicate(dev,
fb_crtc->desired_mode);
+ drm_connector_reference(fb_helper->connector_info[i]->connector);
modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector;
modeset->fb = fb_helper->fb;
modeset->x = offset->x;
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 576faf4..7e13127 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -2579,7 +2579,8 @@ static inline struct drm_encoder *drm_encoder_find(struct drm_device *dev,
return mo ? obj_to_encoder(mo) : NULL;
}
-static inline struct drm_connector *drm_connector_find(struct drm_device *dev,
+/* takes a reference */
+static inline struct drm_connector *drm_connector_lookup(struct drm_device *dev,
uint32_t id)
{
struct drm_mode_object *mo;
@@ -2625,6 +2626,16 @@ static inline uint32_t drm_framebuffer_read_refcount(struct drm_framebuffer *fb)
return atomic_read(&fb->base.refcount.refcount);
}
+static inline void drm_connector_reference(struct drm_connector *connector)
+{
+ drm_mode_object_reference(&connector->base);
+}
+
+static inline void drm_connector_unreference(struct drm_connector *connector)
+{
+ drm_mode_object_unreference(&connector->base);
+}
+
/* Plane list iterator for legacy (overlay only) planes. */
#define drm_for_each_legacy_plane(plane, dev) \
list_for_each_entry(plane, &(dev)->mode_config.plane_list, head) \
--
2.5.5
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